Attachment for operating elevator-gates



(No Model.)

A. P. GOULD.

ATTACHMENT FOR OPERATING ELEvAToE GATES. N0. 510,475.

Patented Dec. 12, 1893.

UNITED STATES PATENT FFICE.

AARON P. GOULD, OF CANTON, OHIO.

ATTACHMENT FOR OPERATING ELEVATOR-GATES.

SPECIFICATION forming part of Letters Patent No. 510,475, dated December12, 1893. I Application filed February 6, 1893. Serial No. 4 1,10 (N0mudeL) To aZZ whom it may concern:

Be it known that I, AARON P. GQULD, a citizen of the United States, anda resident of Canton, county of Stark, State of Ohio, have invented anew and useful Improvements in Attachments for Operating Elevator-Gates,of which the following is a full, clear, and exact description,reference being had to the accompanying drawings, making part of thisspecification.

My invention relates to' elevator gate operatin g devices.

I t has for its object to provide means whereby gates at the entrance tothe elevator shaft will be positively raised when the el vator carreaches the landings to how t'uepassengers to enter the elevator car andwill be lowered when the elevator car passes the landings to preventpersons accidentally walking into the shaft.

With these objects in view the invention consists in certain features ofconstruction and combination of parts which will be hereinafterdescribed and claimed.

In the accompanying drawings, Figure 1, is a side view of an elevatorshaft showing the elevator at a landing and the gate elevated. Fig. 2,is a view of a portion of the elevator car and shaft looking in adirection opposite to that in Fig. 1, and showing the relation betweenthe rack-bars, pinion and camarm when the elevator car and gate are inthe position shown in Fig. l; and Fig. 3, is a detail perspective of thewinding drum and the bracket to which it is adj ustably secured.

A denotes the uprights forming the elevator shaft, and B denotes one ofthe upper landings. The elevator car 0 travels in this shaft and isadapted to rair and lower-the gate D in its upward and downwardmovement. The means for accomplishing this I will now describe. D,denotes a bracket having two parallel projecting arms at d on which areadjustably secured by the set screws (2 sleeves d of the journal boxesd. In these boxes 01 is journaled a drum shaft E carrying at one end awinding drum F and at the other end a pinion G. Attached to this drum isthe gate rope G which passes around supporting pulleys secured to theshaft beams at a point above the gate. Secured to the elevator car aretwo rack bars H one above the otherand to one side of the other. Thesebars if desired may be connected by a bridle I, and one of the bars hasa cam-arm J adapted to ride against a pin K projecting from the face ofthe pinion.

In operation, assuming the gate to be in its closed position and theelevator car at rest, it will be seen that as the elevator car ascends,the upper rack will engage the pinion and rotate it and by the time theelevator car reaches the landing the gate will have been raised to allowpassengers to enter or leave the elevator car. At the moment the carreaches the landing the upper rack-bar has passed out of engagement withthe pinion and the cam-arm has engaged the pinion to hold it againstbeing rotated in the opposite direction by the weight of the gate. Asthe elevator continues to move upward the cam-arm passes out ofengagement with the pin at the instant the lower rack-bar engages thepinion, which rack-bar rotates it in an opposite direction therebyunwinding the rope from the drum and allowing the gate to descend. Whenthe elevator descends the same operation takes place.

In Fig. 3 I have shown the rack-bars adjustably connected with thebridle thus enabling the parts to be easily and accurately fitted toposition when the device is applied to the elevators now in use. Thedrum shaft is made adjustable on the brackets for the same reason.

Having thus described my invention, what I claim, and desire to secureby Letters Patent of the United States, is-

1. The combination with an elevator cage of the upper and lower racks,the cam-arm intermediate the ends of the racks, the drum shaft having apinion and adrum fixed thereto, a pin projecting from the pinion, agate, and a cord connecting the gate with the drum.

2. The combination with of the upper and lower racks, the cam arm movingwith said racks, the bracket having outwardly projecting arms, journalboxes adjustable thereon, a drum shaft carrying a fixed drum and apinion provided with a pin to be engaged by the cam arm.

In testimony whereof I have hereunto set my hand this etthday ofFebruary, A. D. 1893.

AARON P. GOULD.

Witnesses:

W. K. MILLER, BURT A. MILLER.

